Artificial Intelligence Marketing Map

Digital Advertising Guide

Non-Standard ad Units

While the IAB has defined many common banner sizes, there are other options that have yet to be strictly defined. The following ad units are also popular, but because websites set requirements individually, sizes and specifications may vary between sites. These units are typically purchased directly from publishers by advertisers, rather than through ad networks.

Skins

Skins, also known as wallpapers, are customizable and interchangeable background graphics for a webpage or a desktop. Skins may be clickable and can direct users to an external site.

In this example, the unused sides of a webpage are tiled or patterned with a brand's logo.

Rails

Rails are wide skyscraper-style ads that line both the right and left side of a webpage, but not the entire background. Rails may be clickable and can direct users to an external site.

Like with a skin, the unused sides of a webpage are filled with long and narrow banners.